Date   

Re: liquid flux

Andy G4JNT
 

All these metal working ones may well work for ...  well ... heavy  metalwork.

Don't even think of using them on SMD components
You'll seriously them up

Use the proper stuff.

'jnt


On 30 September 2016 at 20:36, ian ian@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Never tried it on electrical, but brillant for tiny copper and brass pipes, used it for fixing antennas as well.
 
Ian
2E0IJH
 
Sent: Friday, September 30, 2016 at 8:27 PM
From: "John Worsnop john@... [ukmicrowaves]" <ukmicrowaves@...>
To: "Ukmicrowaves (ukmicrowaves@...)" <ukmicrowaves@...>
Subject: Re: [ukmicrowaves] liquid flux
 

 

Kevin g3aaj

 
On 30 Sep 2016 18:32, "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM

 

 

 

 



Re: liquid flux

ian hope (2E0IJH)
 

I use this for working on my g scale locos, http://www.cooksongold.com/Jewellery-Tools/Auroflux-Soldering-Fluid-500ml-Un--Unclassified-prcode-998-109.
Never tried it on electrical, but brillant for tiny copper and brass pipes, used it for fixing antennas as well.
 
Ian
2E0IJH

 
Sent: Friday, September 30, 2016 at 8:27 PM
From: "John Worsnop john@... [ukmicrowaves]"
To: "Ukmicrowaves (ukmicrowaves@...)"
Subject: Re: [ukmicrowaves] liquid flux
 

 

Kevin g3aaj

 
On 30 Sep 2016 18:32, "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM

 

 

 

 


Re: liquid flux

g4bao
 

Kevin g3aaj


On 30 Sep 2016 18:32, "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM



Re: liquid flux

GORDONJ REASON <gordonj.reason@...>
 

the flux ............I'd have a chat with Farnell ...........

On 30 September 2016 at 19:17 "'mike' mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 



Hi Neal,
That's exactly what I thought, I have looked on G8KEK web site but cannot find any reference to it, so I thought my memory was playing tricks....
 
Gordon...Thanks for your tale of neighbourly help but this stuff is clear, has a faint smell of lemon and come in a small container with a brush and is great for SMD work!!
 
cheers
 
Mike G6TRM
----- Original Message -----
Sent: Friday, September 30, 2016 7:00 PM
Subject: Re: [ukmicrowaves] liquid flux

 

 

Hi Mike ................

I recently was informed by my neighbour , that she hade water dripping though her kitchen ceiling ....

So , I took a look , and , bless her , she had got all the necessary floorboards up !!! One can only admire her spirit  and support those who help themselves !

Finding the leak was difficult , and now , getting on in life , was'nt thinking outside the box , with idea's ............. but decided a weeping joint was the cause .

So I set to and replaced a section .

I had purchased some flux paste from Wickes ........ and had one dickens of a job to get a good flowing fillet .

A warning to others , I had used this paste on some electronics , and it is water based , and on reasonably high impedance circuitry , it semi shorts out circuitry , neither did it work with th electronic , cored solder ...... so avoid the stuff ..chaps........

I eventually found my flux , that I use for my electronics. . and with multicore solder 

It is by WARTON , made in the uK     BROWN FLUX JELLY .      in a 50 gm pot  ............

It's good stuff .

Sorry , do not remember where it came from ....

www.warton-metals.co.uk 

During my employment years ,in electronics ,  we used at TYPE  369 or 339 ....... or something like that ...... got thru pints of the stuff ........very good it was too .

That was available from Farnell  , or RS Components ?, if I remember correctly ..........

I cannot get on with this lead-free stuff .... seems to be rubbish ...........

happy soldering  Mike !

On 30 September 2016 at 18:32 "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM



 


 


 

 

 


 


 


OT - Newark Hamfest

g8zha <g8zha@...>
 

Did anyone go to Newark today? Was it worth the trip?

 

I usually visit on the Friday, but couldn’t get the day off, so going tomorrow.

 

 

Rich


Re: liquid flux

mike G6TRM
 


Thanks to all that replied...
For those who have never tried it...get some from Kev, ideal for SMD work and stuff that should but doesn't want to solder i.e. tinsel wire. also really great for turbo boosting
de-soldering braid
Just a happy customer...
 
cheers
 
Mike G6TRM
 

----- Original Message -----
Sent: Friday, September 30, 2016 7:34 PM
Subject: Re: [ukmicrowaves] liquid flux

 



Hi Kev,
I would like to order some from you direct if you don't mind..I tried to look for it on the web but it only comes up with bitcircuitservices and it looked like they only sell in bulk.
I will contact you direct
 
thanks
 
Mike G6TRM
----- Original Message -----
Sent: Friday, September 30, 2016 7:20 PM
Subject: RE: [ukmicrowaves] liquid flux

 

Hi Mike

Yes no problem it was myself Kevin G3AAF if you are going to the Hamfest I have it on the stall or I can ship direct to your QTH ?

Regards

Kevin G3AAF

========================================
Message Received: Sep 30 2016, 06:32 PM
From: "mb.golfmad@... [ukmicrowaves]"
To: ukmicrowaves@...
Cc:
Subject: [ukmicrowaves] liquid flux

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM


FERRANTI PLS, info pse.

rein0zn@...
 

Hello ALL,

A few years ago, I bought on eBAY a FERRANTI PLS for 8.900 GHz, single freq.

Type S/VPM-XZ1B-1501-1

I believe FERRANTI went through a Merger or other operation and I have been unable
to find much on Ferranti.

The LO worked great but then recently locking problems started to occur and over
a relative short period the PLS failed to lock at all, using a working 10 MHz reference.

A very strange looking ( on SA ) signal is generated at around 8.8 GHz.

This type does look like relative recently made.

Hoping to find some help here to get this well made LO working again....

73 Rein W6sZ


Re: liquid flux

mike G6TRM
 


Hi Kev,
I would like to order some from you direct if you don't mind..I tried to look for it on the web but it only comes up with bitcircuitservices and it looked like they only sell in bulk.
I will contact you direct
 
thanks
 
Mike G6TRM

----- Original Message -----
Sent: Friday, September 30, 2016 7:20 PM
Subject: RE: [ukmicrowaves] liquid flux

 

Hi Mike

Yes no problem it was myself Kevin G3AAF if you are going to the Hamfest I have it on the stall or I can ship direct to your QTH ?

Regards

Kevin G3AAF

========================================
Message Received: Sep 30 2016, 06:32 PM
From: "mb.golfmad@... [ukmicrowaves]"
To: ukmicrowaves@...
Cc:
Subject: [ukmicrowaves] liquid flux

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM


Re: liquid flux

kev <kevin@...>
 

Hi Mike

its not on the G8FEK web site at the moment I will ship direct to your QTH pls contact off me list at Kevin@...

with your details .

Regards Kevin G3AAF





========================================
Message Received: Sep 30 2016, 07:18 PM
From: "'mike' mb.golfmad@... [ukmicrowaves]"
To: ukmicrowaves@...
Cc:
Subject: Re: [ukmicrowaves] liquid flux

Hi Neal,
That's exactly what I thought, I have looked on G8KEK web site but cannot find any reference to it, so I thought my memory was playing tricks....

Gordon...Thanks for your tale of neighbourly help but this stuff is clear, has a faint smell of lemon and come in a small container with a brush and is great for SMD work!!

cheers

Mike G6TRM

----- Original Message -----
From: GORDONJ REASON gordonj.reason@... [ukmicrowaves]
To: ukmicrowaves
Sent: Friday, September 30, 2016 7:00 PM
Subject: Re: [ukmicrowaves] liquid flux




Hi Mike ................

I recently was informed by my neighbour , that she hade water dripping though her kitchen ceiling ....

So , I took a look , and , bless her , she had got all the necessary floorboards up !!! One can only admire her spirit and support those who help themselves !

Finding the leak was difficult , and now , getting on in life , was'nt thinking outside the box , with idea's ............. but decided a weeping joint was the cause .

So I set to and replaced a section .

I had purchased some flux paste from Wickes ........ and had one dickens of a job to get a good flowing fillet .

A warning to others , I had used this paste on some electronics , and it is water based , and on reasonably high impedance circuitry , it semi shorts out circuitry , neither did it work with th electronic , cored solder ...... so avoid the stuff ..chaps........

I eventually found my flux , that I use for my electronics. . and with multicore solder

It is by WARTON , made in the uK BROWN FLUX JELLY . in a 50 gm pot ............

It's good stuff .

Sorry , do not remember where it came from ....

www.warton-metals.co.uk

During my employment years ,in electronics , we used at TYPE 369 or 339 ....... or something like that ...... got thru pints of the stuff ........very good it was too .

That was available from Farnell , or RS Components ?, if I remember correctly ..........

I cannot get on with this lead-free stuff .... seems to be rubbish ...........

happy soldering Mike !

,

On 30 September 2016 at 18:32 "mb.golfmad@... [ukmicrowaves]" wrote:


Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM


Re: liquid flux

kev <kevin@...>
 

Hi Mike

Yes no problem it was myself Kevin G3AAF if you are going to the Hamfest I have it on the stall or I can ship direct to your QTH ?

Regards

Kevin G3AAF


========================================
Message Received: Sep 30 2016, 06:32 PM
From: "mb.golfmad@... [ukmicrowaves]"
To: ukmicrowaves@...
Cc:
Subject: [ukmicrowaves] liquid flux

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM


Re: liquid flux

Andy G4JNT
 

It's supplied by Kevin Avery G3AAF
But not sure how you get hold of him / it online
Try Googling

Andy  G4JNT


On 30 September 2016 at 19:17, 'mike' mb.golfmad@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 



Hi Neal,
That's exactly what I thought, I have looked on G8KEK web site but cannot find any reference to it, so I thought my memory was playing tricks....
 
Gordon...Thanks for your tale of neighbourly help but this stuff is clear, has a faint smell of lemon and come in a small container with a brush and is great for SMD work!!
 
cheers
 
Mike G6TRM
----- Original Message -----
Sent: Friday, September 30, 2016 7:00 PM
Subject: Re: [ukmicrowaves] liquid flux

 

Hi Mike ................

I recently was informed by my neighbour , that she hade water dripping though her kitchen ceiling ....

So , I took a look , and , bless her , she had got all the necessary floorboards up !!! One can only admire her spirit  and support those who help themselves !

Finding the leak was difficult , and now , getting on in life , was'nt thinking outside the box , with idea's ............. but decided a weeping joint was the cause .

So I set to and replaced a section .

I had purchased some flux paste from Wickes ........ and had one dickens of a job to get a good flowing fillet .

A warning to others , I had used this paste on some electronics , and it is water based , and on reasonably high impedance circuitry , it semi shorts out circuitry , neither did it work with th electronic , cored solder ...... so avoid the stuff ..chaps........

I eventually found my flux , that I use for my electronics. . and with multicore solder 

It is by WARTON , made in the uK     BROWN FLUX JELLY .      in a 50 gm pot  ............

It's good stuff .

Sorry , do not remember where it came from ....

www.warton-metals.co.uk 

During my employment years ,in electronics ,  we used at TYPE  369 or 339 ....... or something like that ...... got thru pints of the stuff ........very good it was too .

That was available from Farnell  , or RS Components ?, if I remember correctly ..........

I cannot get on with this lead-free stuff .... seems to be rubbish ...........

happy soldering  Mike !

On 30 September 2016 at 18:32 "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM



 


 


 



Re: liquid flux

mike G6TRM
 


Hi Neal,
That's exactly what I thought, I have looked on G8KEK web site but cannot find any reference to it, so I thought my memory was playing tricks....
 
Gordon...Thanks for your tale of neighbourly help but this stuff is clear, has a faint smell of lemon and come in a small container with a brush and is great for SMD work!!
 
cheers
 
Mike G6TRM

----- Original Message -----
Sent: Friday, September 30, 2016 7:00 PM
Subject: Re: [ukmicrowaves] liquid flux

 

Hi Mike ................

I recently was informed by my neighbour , that she hade water dripping though her kitchen ceiling ....

So , I took a look , and , bless her , she had got all the necessary floorboards up !!! One can only admire her spirit  and support those who help themselves !

Finding the leak was difficult , and now , getting on in life , was'nt thinking outside the box , with idea's ............. but decided a weeping joint was the cause .

So I set to and replaced a section .

I had purchased some flux paste from Wickes ........ and had one dickens of a job to get a good flowing fillet .

A warning to others , I had used this paste on some electronics , and it is water based , and on reasonably high impedance circuitry , it semi shorts out circuitry , neither did it work with th electronic , cored solder ...... so avoid the stuff ..chaps........

I eventually found my flux , that I use for my electronics. . and with multicore solder 

It is by WARTON , made in the uK     BROWN FLUX JELLY .      in a 50 gm pot  ............

It's good stuff .

Sorry , do not remember where it came from ....

www.warton-metals.co.uk 

During my employment years ,in electronics ,  we used at TYPE  369 or 339 ....... or something like that ...... got thru pints of the stuff ........very good it was too .

That was available from Farnell  , or RS Components ?, if I remember correctly ..........

I cannot get on with this lead-free stuff .... seems to be rubbish ...........

happy soldering  Mike !

On 30 September 2016 at 18:32 "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM



 


 


 


Re: liquid flux

GORDONJ REASON <gordonj.reason@...>
 

Hi Mike ................

I recently was informed by my neighbour , that she hade water dripping though her kitchen ceiling ....

So , I took a look , and , bless her , she had got all the necessary floorboards up !!! One can only admire her spirit  and support those who help themselves !

Finding the leak was difficult , and now , getting on in life , was'nt thinking outside the box , with idea's ............. but decided a weeping joint was the cause .

So I set to and replaced a section .

I had purchased some flux paste from Wickes ........ and had one dickens of a job to get a good flowing fillet .

A warning to others , I had used this paste on some electronics , and it is water based , and on reasonably high impedance circuitry , it semi shorts out circuitry , neither did it work with th electronic , cored solder ...... so avoid the stuff ..chaps........

I eventually found my flux , that I use for my electronics. . and with multicore solder 

It is by WARTON , made in the uK     BROWN FLUX JELLY .      in a 50 gm pot  ............

It's good stuff .

Sorry , do not remember where it came from ....

www.warton-metals.co.uk 

During my employment years ,in electronics ,  we used at TYPE  369 or 339 ....... or something like that ...... got thru pints of the stuff ........very good it was too .

That was available from Farnell  , or RS Components ?, if I remember correctly ..........

I cannot get on with this lead-free stuff .... seems to be rubbish ...........

happy soldering  Mike !

On 30 September 2016 at 18:32 "mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM


 


 


 


liquid flux

mike G6TRM
 

Hi All,
Can anyone help?
A while back I purchase some liquid flux from one of the stalls at Martelsham RT. Sadly it has almost run out and I need to purchase some more.. It is labelled BLT 10-75-30-R
Can anyone remember who sold it?

many thanks

73

Mike G6TRM



UP DOWN COUNTER FOR ELEVATION JACK

g4uvz@...
 

I recently purchased an elevation jack with a pulsed output and needed to arrange an indoor readout of the 

elevation...I thought that I had the answer in the junk box with a ZN1040E and some old 7 segment displays.


I assembled the lot and it was all working ....until I put it in a box....then it stopped!!!


The lamp test worked fine but it refused to count....I guessed that the chip had failed so went on to Ebay and


 had a shock ...cheapest chip was £32!


Looking further on Ebay I found an up-down counter for £6.20   which also retained the count when switched


 off!


I have now installed this in the box and it works extremely well...If anyone has a similar application this may


 be the answer   Blue LED 4-Digital Display DC 5-8V 0-9999 Up and Down Digital Counter Totalizer

 


GB3USK

Graham G3TCT
 

GB3USK 1296.870 +/- is on again today as from 1300z. Batteries fully charged and rearranged, so hoping it stays up this time. Operating times unchanged at 0600-2000z at present.

73
Graham


Re: WSJT Modes in Contests [1 Attachment]

Martin A Hall <gorrell77@...>
 

Sorry, missed out a key sentence.  We’d like to produce a tidied up version of this document to include similar guidance for using 13-character message modes in contests, including the new digital modes such as MSK144, if we can find a way of doing so.
 
73,
Martin
 

From: 'Martin A Hall' gorrell77@... [ukmicrowaves]
Sent: Friday, September 30, 2016 12:12 PM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] WSJT Modes in Contests [1 Attachment]
 

Hello Conrad,
 
I attach a guide that the GMDX contest group has been promulgating, which works with JT6M and FSK441.  It’s been offered twice to the RSGB VHF Contest Committee to include in its contest support documentation, but for reasons unknown it has not yet been taken on board.  I hope you find the guide useful.
 
If you or anyone else has any comments that will help us improve this document, I’ll be delighted to receive them.
 
Digital modes are an excellent way of making QSOs between GM and EU countries, either via Meteor Scatter, Troposcatter, Ionoscatter, or other weak-signal conditions, mainly on 2m, 4m and 6m, although GMs have been experimenting at higher frequencies as well.  JT6M seems particularly good at cutting through local noise in urban areas, which might extend its appeal, although our experiments are in their infancy.  Has anyone else experienced this with JT6M or other digital modes? 
 
I am particularly interested in using digital modes at microwave frequencies for contest exchanges, which really triggered this thread. 
 
Good contesting!
73,
Martin
 
 
From: Conrad PA5Y g0ruz@... [ukmicrowaves]
Sent: Friday, September 30, 2016 11:19 AM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] WSJT Modes in Contests
 

I was thinking of trying this to get a few extra multipliers in the UKAC. We need to add locators to the exchange that Andy has proposed. I know some people are already doing this. For me I cannot seem to work well into GM any other way.

How can we optimally make the necessary exchange of locator, serial number and report?

Regards

Conrad PA5Y

On 30 September 2016 10:57:16 CEST, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
I don't recall that message on 7 September which was only a couple of weeks ago.  I've searched though the sent messages and can't find it...
Although do vaguely remember writing something like that a long while ago.
 
All the WSJT modes support free format text messages of up to 13 characters. 
Look at the messages the beacons put out . eg "GB3SCX IO80UU".  That uses free text format.
 
If you want to use  the WSJT modes in a contest, there must surely be a way of getting everything into a couple of free-text message exchanges.  How about :
 
eg.   CQ  G4JNT       [std format]
       G4JNT G8IMR      [std format]
       IMR JNT 59004     [free text]
       JNT IMR 53021     [free text]
       G8IMR G4JNT R   [std format]
 
To understand the differences between free text (13 characters) and standard messages (two callsigns and a one or two other bits of information) study the WSJT manual
 
Andy  G4JNT
 
On 30 September 2016 at 09:39, 'Martin A Hall' gorrell77@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 
Andy ‘JNT gave us a very helpful and comprehensive explanation of digital modes in his message “Transmitter Linearity” on 07/09/2016 at 11:54.  Since I am a keen contester (non-EME for now), and participate in the NRAU Activity Contests from time to time, where digital modes are extensively used, and also use digital modes in the RSGB UK contests now that the barrier to their use has been removed, the following comment attracted my attention:
“The weak signal WSJT modes take all this into account and I think really do represent the best we are going to get on the amateur bands for weak signal Dx type working.    They don't support real time waffle type QSOs, where RTTY and PSK31 would be used, but for contest and EME exchanges and pre-formatted  messages can't be beaten”
The contests I refer to above require 6-figure locator plus (in the case of UK contests) a serial number, as well as signal report.  Modes such as JT6M and FSK441 support the exchange of such information since messages are relatively free in their format (within limitations).  The superior optimal modes that will replace them for general QSOs (minimal exchanges), such as MSK144 and QRA64 are, like JT65, highly structured, and don’t in their current form support the exchange of the contest information I’ve described.  So, I would be interested, Andy, if you would expand your comment about pre-formatted messages for contests using the new modes.  Am I missing something?
 
It leads me to wonder what is going to happen in the future.  Are operators going to continue to use JT6M and FSK441 in contests, and more effective modes outside contests?  Are digital modes being developed that will handle the contest exchanges I’ve described in a more efficient manner?
 
Whilst on this topic, I’d be interested in any feedback from members of the group on the best digital modes for terrestrial contest use on 430 MHz up to 10 GHz for contacts using scatter and for limit-range direct tropo.
 
Apologies if there are references to non-microwave activity in my message – although slightly off-topic they do relate to Andy’s original posting; and please forgive me if my questions appear naive – I’m still learning about digital modes.
 
73,
Martin
GM8IEM – IO78HF    
 
 
 


Re: WSJT Modes in Contests

Martin A Hall <gorrell77@...>
 

Hello Conrad,
 
I attach a guide that the GMDX contest group has been promulgating, which works with JT6M and FSK441.  It’s been offered twice to the RSGB VHF Contest Committee to include in its contest support documentation, but for reasons unknown it has not yet been taken on board.  I hope you find the guide useful.
 
If you or anyone else has any comments that will help us improve this document, I’ll be delighted to receive them.
 
Digital modes are an excellent way of making QSOs between GM and EU countries, either via Meteor Scatter, Troposcatter, Ionoscatter, or other weak-signal conditions, mainly on 2m, 4m and 6m, although GMs have been experimenting at higher frequencies as well.  JT6M seems particularly good at cutting through local noise in urban areas, which might extend its appeal, although our experiments are in their infancy.  Has anyone else experienced this with JT6M or other digital modes? 
 
I am particularly interested in using digital modes at microwave frequencies for contest exchanges, which really triggered this thread. 
 
Good contesting!
73,
Martin
 
 

From: Conrad PA5Y g0ruz@... [ukmicrowaves]
Sent: Friday, September 30, 2016 11:19 AM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] WSJT Modes in Contests
 

I was thinking of trying this to get a few extra multipliers in the UKAC. We need to add locators to the exchange that Andy has proposed. I know some people are already doing this. For me I cannot seem to work well into GM any other way.

How can we optimally make the necessary exchange of locator, serial number and report?

Regards

Conrad PA5Y

On 30 September 2016 10:57:16 CEST, "Andy Talbot andy.g4jnt@... [ukmicrowaves]" wrote:
I don't recall that message on 7 September which was only a couple of weeks ago.  I've searched though the sent messages and can't find it...
Although do vaguely remember writing something like that a long while ago.
 
All the WSJT modes support free format text messages of up to 13 characters. 
Look at the messages the beacons put out . eg "GB3SCX IO80UU".  That uses free text format.
 
If you want to use  the WSJT modes in a contest, there must surely be a way of getting everything into a couple of free-text message exchanges.  How about :
 
eg.   CQ  G4JNT       [std format]
       G4JNT G8IMR      [std format]
       IMR JNT 59004     [free text]
       JNT IMR 53021     [free text]
       G8IMR G4JNT R   [std format]
 
To understand the differences between free text (13 characters) and standard messages (two callsigns and a one or two other bits of information) study the WSJT manual
 
Andy  G4JNT
 
On 30 September 2016 at 09:39, 'Martin A Hall' gorrell77@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 
Andy ‘JNT gave us a very helpful and comprehensive explanation of digital modes in his message “Transmitter Linearity” on 07/09/2016 at 11:54.  Since I am a keen contester (non-EME for now), and participate in the NRAU Activity Contests from time to time, where digital modes are extensively used, and also use digital modes in the RSGB UK contests now that the barrier to their use has been removed, the following comment attracted my attention:
“The weak signal WSJT modes take all this into account and I think really do represent the best we are going to get on the amateur bands for weak signal Dx type working.    They don't support real time waffle type QSOs, where RTTY and PSK31 would be used, but for contest and EME exchanges and pre-formatted  messages can't be beaten”
The contests I refer to above require 6-figure locator plus (in the case of UK contests) a serial number, as well as signal report.  Modes such as JT6M and FSK441 support the exchange of such information since messages are relatively free in their format (within limitations).  The superior optimal modes that will replace them for general QSOs (minimal exchanges), such as MSK144 and QRA64 are, like JT65, highly structured, and don’t in their current form support the exchange of the contest information I’ve described.  So, I would be interested, Andy, if you would expand your comment about pre-formatted messages for contests using the new modes.  Am I missing something?
 
It leads me to wonder what is going to happen in the future.  Are operators going to continue to use JT6M and FSK441 in contests, and more effective modes outside contests?  Are digital modes being developed that will handle the contest exchanges I’ve described in a more efficient manner?
 
Whilst on this topic, I’d be interested in any feedback from members of the group on the best digital modes for terrestrial contest use on 430 MHz up to 10 GHz for contacts using scatter and for limit-range direct tropo.
 
Apologies if there are references to non-microwave activity in my message – although slightly off-topic they do relate to Andy’s original posting; and please forgive me if my questions appear naive – I’m still learning about digital modes.
 
73,
Martin
GM8IEM – IO78HF    
 
 
 


Re: WSJT Modes in Contests

Martin A Hall <gorrell77@...>
 

Yes, time does fly when you’re retired, doesn’t it, Andy!  My question was somewhat delayed for the same reason.  Your response gives me something to think about further, but there are some flaws in your example, one fatal, I believe:
 
Your example doesn’t include the 6-figure locator.  I could send GM8IEM IO78HF within the 13 characters, but not CQ GM8IEM IO78HF, although protocols could define the shorter message as such, I guess (i.e. GM8IEM IO78HF = CQ GM8IEM IO78HF).
 
It would be possible to get both calls within 13 characters, unless /P, for example GM8IEM GM4VVX, but where in the sequence does GM4VVX return his 6-figure locator?  I think this is the fatal flaw. 
 
The fourth line in your example would have to be JNT IMR R53021 if the QSO isn’t going to get stuck in a loop, but that exceeds 13 characters.  It would be possible to send GM4IMR R53021 within the 13 characters, and I think that would be acceptable, since both full calls have already been exchanged.  
 
Also GM4VVX GM8IEM R exceeds 13 characters, though I could send VVX IEM R, or just GM8IEM RRR, both of which would be quite acceptable.
 
Both ends also have to ensure that the short message format (Sh) is disabled, of course.
 
I’ve studied the WSJT manual and other support documentation – my question really revolves around how we can best use the 13 characters we have available in the new modes in a contest scenario. 
 
At VHF, in the Post Code contests, where digital modes have shown themselves useful when other modes fail, an extra 2 digits are required (e.g. the IV post code information) and I think that becomes impossible with just 13 characters and 5 messages, so the older modes are likely to continue in use.
 
I would be interested in any comments from others.
 
In contests, if we are stuck with the older modes where we can exceed 13 characters, which would be the best modes for the bands between 430 MHz and 10 GHz?
 
73,
Martin
GM8IEM – IO78HF
 
 

From: Andy Talbot andy.g4jnt@... [ukmicrowaves]
Sent: Friday, September 30, 2016 9:57 AM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] WSJT Modes in Contests
 

I don't recall that message on 7 September which was only a couple of weeks ago.  I've searched though the sent messages and can't find it...
Although do vaguely remember writing something like that a long while ago.
 
All the WSJT modes support free format text messages of up to 13 characters. 
Look at the messages the beacons put out . eg "GB3SCX IO80UU".  That uses free text format.
 
If you want to use  the WSJT modes in a contest, there must surely be a way of getting everything into a couple of free-text message exchanges.  How about :
 
eg.   CQ  G4JNT       [std format]
       G4JNT G8IMR      [std format]
       IMR JNT 59004     [free text]
       JNT IMR 53021     [free text]
       G8IMR G4JNT R   [std format]
 
To understand the differences between free text (13 characters) and standard messages (two callsigns and a one or two other bits of information) study the WSJT manual
 
Andy  G4JNT
 
On 30 September 2016 at 09:39, 'Martin A Hall' gorrell77@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 
Andy ‘JNT gave us a very helpful and comprehensive explanation of digital modes in his message “Transmitter Linearity” on 07/09/2016 at 11:54.  Since I am a keen contester (non-EME for now), and participate in the NRAU Activity Contests from time to time, where digital modes are extensively used, and also use digital modes in the RSGB UK contests now that the barrier to their use has been removed, the following comment attracted my attention:
“The weak signal WSJT modes take all this into account and I think really do represent the best we are going to get on the amateur bands for weak signal Dx type working.    They don't support real time waffle type QSOs, where RTTY and PSK31 would be used, but for contest and EME exchanges and pre-formatted  messages can't be beaten”
The contests I refer to above require 6-figure locator plus (in the case of UK contests) a serial number, as well as signal report.  Modes such as JT6M and FSK441 support the exchange of such information since messages are relatively free in their format (within limitations).  The superior optimal modes that will replace them for general QSOs (minimal exchanges), such as MSK144 and QRA64 are, like JT65, highly structured, and don’t in their current form support the exchange of the contest information I’ve described.  So, I would be interested, Andy, if you would expand your comment about pre-formatted messages for contests using the new modes.  Am I missing something?
 
It leads me to wonder what is going to happen in the future.  Are operators going to continue to use JT6M and FSK441 in contests, and more effective modes outside contests?  Are digital modes being developed that will handle the contest exchanges I’ve described in a more efficient manner?
 
Whilst on this topic, I’d be interested in any feedback from members of the group on the best digital modes for terrestrial contest use on 430 MHz up to 10 GHz for contacts using scatter and for limit-range direct tropo.
 
Apologies if there are references to non-microwave activity in my message – although slightly off-topic they do relate to Andy’s original posting; and please forgive me if my questions appear naive – I’m still learning about digital modes.
 
73,
Martin
GM8IEM – IO78HF    
 
 
 


Re: 23cm Yagis

ian hope (2E0IJH)
 

Presume you mean stauff clamps, http://www.pipelineproductsdirect.com/c-17632-stauff-pipe-clamps-standard-series.aspx
 
use the basic ones, just the plastic clamp for 2m and 70cm yagis, have not thought about using them on 23cm as a standard clamp only goes down to 6mm, you'd need the light guage ones http://www.pipelineproductsdirect.com/c-21894-group-1-32-8mm.aspx to fit smaller elements, and I have no idea on there suitability.
 
Ian
2E0IJH

 
Sent: Friday, September 30, 2016 at 2:57 AM
From: "BOB VK6KW rlockley@... [ukmicrowaves]"
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] 23cm Yagis
 

Try plastic clips made for hydraulic lines : I recall someone finding them very suitable, certainly for size and strength, but materials will vary between manufacturers. 73, Bob VK6KA.

"Paul Nickalls paulnick@... [ukmicrowaves]" wrote:

>When assessing mounting insulators I was advised to put a glass of water
>in the corner of the microwave oven and put an insulator under test on
>the turntable. If it gets hot then is is not good at microwave
>frequencies. Black plastics tend to be carbon loaded and should always
>be tested.
>
>Paul
>G8AQA
>
>On 29/09/2016 18:29, Christopher Bartram cbartram@...
>[ukmicrowaves] wrote:
>> Hello Brian
>>
>> >> horrific at the spacing I had. It was only when I got a spacing of
>> getting on for 3 or 4 cm it began to look OK. I don't have pipe-clips
>> tall enough, so I'm thinking about a thru-boom design, but a bit wary of
>> it.
>>
>> That's very interesting, indeed. My only comment is that my measurements
>> made some years ago. It would be very interesting to repeat the
>> measurements, or possibly better to simulate them in a 3D EM simulator.
>>
>> The clips I've used were made by Netlon and place the centre of the
>> element 20mm above the surface of the boom. They are no longer made. I'd
>> have attached a photo, but my camera's battery ran-out of electrons as
>> I was trying to take it. However, you can see one on Derek, G4CQM's site
>> <http://g4cqm.www.idnet.com/antennadesigner/paraclips.htm> I attach my
>> insulators to the boom using self-tapping screws from the 'other' side
>> of the boom. The clips make a good mount, and I didn't even had problems
>> with the elements I used on a 80MHz yagi I used to detect ( a very few!)
>> meteor bursts on the video carrier frequency of the CJON-TV transmitter
>> in St.Johns, Newfoundland.
>>
>> Derek has designed, and had made an improved clip which is, I believe,
>> available from G6HKS. I've not used them, but it seems that they may
>> result in the element sitting a few mm further away from the boom.
>>
>> When you model the boom/element structure, it might well be worth
>> including the effect of the insulator. I've not tried this, and I've
>> never seen it suggested, but the polyprop sleeve which effectively
>> encloses a section of the element, in the case of both the Netlon and
>> 'CQM clips might , by slowing the propagation rate of the EM wave along
>> the element, produce a lengthening effect which could compensate for the
>> shortening effect of the proximity of the boom. That could be
>> particularly significant at 23!
>>
>> Vy 73
>>
>> Chris
>> GW4DGU
>>
>
>
>
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